Problem with my rig, the feet stick to the ground
You need to select the bones called Bone.033.L and Bone.033.R and enable their Deform option (or assign these parts to the feet bones):

Actually you must have enabled the Deform option when you've parented, then you must have disabled it, it would have been better not to enable in the first place so that it was not taken into account during the parenting, IK controllers are not supposed to deform the mesh.
So it would be more logical to keep the Deform option disabled and assign this part to the foot bone.